Cover for a step



FIG. 1 is a perspective view of a cover for a step showing my newdesign;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left end elevational view thereof; and

FIG. 6 is a right end elevational view thereof.

The ornamental design for a cover for a step, substantially as shown.